Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4eafbd807545e57…

MALICIOUS

PDF

69.7 KB Created: 2020-11-20 18:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b51adb27b9cc8571f5829959f390c36d SHA-1: 666e5e3bcf4c844c769b4913b4657139c9cd7fad SHA-256: b4eafbd807545e57abeb011995333c864967423176ece899fa4d3fe04726e0f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL is likely intended to lead the user to a malicious site. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/123?utm_term=war+of+rights+company+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fa0c88d5f98f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5f990178c9e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f953f44c0594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_5f977276d52de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8b8fc85002a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5faf02552c71a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_5faa300b83418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5f901af475e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f86fa7b8c8d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f8e988025afc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/best_music_sheet_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/14548018378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32986793-00e6-4678-88cc-0c7edbe5a803/webugomiridetupeta.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19E 5544 bytes
SHA-256: 23671a3007ddb0385ef0059e471ac2c7c40052ddba23a67aec098330978f7f23
font_01_sfnt_off0000e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 11444 bytes
SHA-256: f8d9417918c5c7dc9bb9b4439c038b88f1150f7a63f79a275be523b766f69a70

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